The Red Hat docker package before 1.5.0-28, when using the –add-registry option, falls back to HTTP when the HTTPS connection to the registry fails, which allows man-in-the-middle attackers to conduct downgrade attacks and obtain authentication and image data by leveraging a network position between the client and the registry to block HTTPS traffic. NOTE: this vulnerability exists because of a CVE-2014-5277 regression.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1843
Reference (s):
- BID:73936
- URL: http://www.securityfocus.com/bid/73936
- https://bugzilla.redhat.com/show_bug.cgi?id=1206443
- REDHAT:RHSA-2015:0776
- URL: http://rhn.redhat.com/errata/RHSA-2015-0776.html